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path: root/fs/ocfs2/extent_map.c (follow)
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2007-07-10ocfs2: btree changes for unwritten extentsMark Fasheh1-31/+0
Writes to a region marked as unwritten might result in a record split or merge. We can support splits by making minor changes to the existing insert code. Merges require left rotations which mostly re-use right rotation support functions. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-07-10[PATCH] ocfs2: use list_for_each_entry where beneficalChristoph Hellwig1-7/+3
Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-04-26ocfs2: Cache extent recordsMark Fasheh1-0/+255
The extent map code was ripped out earlier because of an inability to deal with holes. This patch adds back a simpler caching scheme requiring far less code. Our old extent map caching was designed back when meta data block caching in Ocfs2 didn't work very well, resulting in many disk reads. These days our metadata caching is much better, resulting in no un-necessary disk reads. As a result, extent caching doesn't have to be as fancy, nor does it have to cache as many extents. Keeping the last 3 extents seen should be sufficient to give us a small performance boost on some streaming workloads. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-04-26ocfs2: Fix extent lookup to return true size of holesMark Fasheh1-4/+103
Initially, we had wired things to return a size '1' of holes. Cook up a small amount of code to find the next extent and calculate the number of clusters between the virtual offset and the next allocated extent. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-04-26ocfs2: Read from an unwritten extent returns zerosMark Fasheh1-3/+11
Return an optional extent flags field from our lookup functions and wire up callers to treat unwritten regions as holes for the purpose of returning zeros to the user. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-04-26ocfs2: make room for unwritten extents flagMark Fasheh1-4/+15
Due to the size of our group bitmaps, we'll never have a leaf node extent record with more than 16 bits worth of clusters. Split e_clusters up so that leaf nodes can get a flags field where we can mark unwritten extents. Interior nodes whose length references all the child nodes beneath it can't split their e_clusters field, so we use a union to preserve sizing there. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-04-26ocfs2: teach ocfs2_file_aio_write() about sparse filesMark Fasheh1-2/+2
Unfortunately, ocfs2 can no longer make use of generic_file_aio_write_nlock() because allocating writes will require zeroing of pages adjacent to the I/O for cluster sizes greater than page size. Implement a custom file write here, which can order page locks for zeroing. This also has the advantage that cluster locks can easily be ordered outside of the page locks. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-04-26ocfs2: temporarily remove extent map cachingMark Fasheh1-943/+81
The code in extent_map.c is not prepared to deal with a subtree being rotated between lookups. This can happen when filling holes in sparse files. Instead of a lengthy patch to update the code (which would likely lose the benefit of caching subtree roots), we remove most of the algorithms and implement a simple path based lookup. A less ambitious extent caching scheme will be added in a later patch. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-12-07[PATCH] slab: remove kmem_cache_tChristoph Lameter1-1/+1
Replace all uses of kmem_cache_t with struct kmem_cache. The patch was generated using the following script: #!/bin/sh # # Replace one string by another in all the kernel sources. # set -e for file in `find * -name "*.c" -o -name "*.h"|xargs grep -l $1`; do quilt add $file sed -e "1,\$s/$1/$2/g" $file >/tmp/$$ mv /tmp/$$ $file quilt refresh done The script was run like this sh replace kmem_cache_t "struct kmem_cache" Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-29ocfs2: silence -EEXIST from ocfs2_extent_map_insert/lookupJoel Becker1-7/+22
Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-05-17ocfs2: fix gfp mask in some file system pathsSunil Mushran1-3/+3
We were using GFP_KERNEL in a handful of places which really wanted GFP_NOFS. Fix this. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-03-24ocfs2: don't use MLF* in the file systemMark Fasheh1-17/+17
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-03-01ocfs2: Respond to on-disk corruption in the extent map code.Joel Becker1-2/+36
The extent map code has long noticed when the on-disk extent information is corrupt. However, so far it has only returned an error. We should take the filesystem read-only, as it is corrupt. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-02-03[PATCH] BUG_ON() Conversion in fs/ocfs2/Eric Sesterhenn / snakebyte1-6/+4
this changes if() BUG(); constructs to BUG_ON() which is cleaner, contains unlikely() and can better optimized away. Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-02-03[PATCH] OCFS2: __init / __exit problemAdrian Bunk1-1/+1
Functions called by __init funtions mustn't be __exit. Reported by Jan-Benedict Glaw <jbglaw@lug-owl.de>. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-01-03[PATCH] OCFS2: The Second Oracle Cluster FilesystemMark Fasheh1-0/+994
The OCFS2 file system module. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com> Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>
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